| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_BROWSER_MEDIA_SYSTEM_MEDIA_CONTROLS_NOTIFIER_H_ |
| #define CONTENT_BROWSER_MEDIA_SYSTEM_MEDIA_CONTROLS_NOTIFIER_H_ |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "base/sequence_checker.h" |
| #include "base/timer/timer.h" |
| #include "content/common/content_export.h" |
| #include "mojo/public/cpp/bindings/receiver.h" |
| #include "mojo/public/cpp/bindings/remote.h" |
| #include "services/media_session/public/mojom/media_controller.mojom.h" |
| |
| namespace system_media_controls { |
| class SystemMediaControlsService; |
| } // namespace system_media_controls |
| |
| namespace service_manager { |
| class Connector; |
| } // namespace service_manager |
| |
| namespace content { |
| |
| // The SystemMediaControlsNotifier connects to Window's "System Media Transport |
| // Controls" and keeps the OS informed of the current media playstate and |
| // metadata. It observes changes to the active Media Session and updates the |
| // SMTC accordingly. |
| class CONTENT_EXPORT SystemMediaControlsNotifier |
| : public media_session::mojom::MediaControllerObserver, |
| public media_session::mojom::MediaControllerImageObserver { |
| public: |
| explicit SystemMediaControlsNotifier(service_manager::Connector* connector); |
| ~SystemMediaControlsNotifier() override; |
| |
| void Initialize(); |
| |
| // media_session::mojom::MediaControllerObserver implementation. |
| void MediaSessionInfoChanged( |
| media_session::mojom::MediaSessionInfoPtr session_info) override; |
| void MediaSessionMetadataChanged( |
| const base::Optional<media_session::MediaMetadata>& metadata) override; |
| void MediaSessionActionsChanged( |
| const std::vector<media_session::mojom::MediaSessionAction>& actions) |
| override {} |
| void MediaSessionChanged( |
| const base::Optional<base::UnguessableToken>& request_id) override {} |
| void MediaSessionPositionChanged( |
| const base::Optional<media_session::MediaPosition>& position) override {} |
| |
| // media_session::mojom::MediaControllerImageObserver implementation. |
| void MediaControllerImageChanged( |
| ::media_session::mojom::MediaSessionImageType type, |
| const SkBitmap& bitmap) override; |
| |
| void SetSystemMediaControlsServiceForTesting( |
| system_media_controls::SystemMediaControlsService* service) { |
| service_ = service; |
| } |
| |
| private: |
| friend class SystemMediaControlsNotifierTest; |
| |
| // Polls the current idle state of the system. |
| void CheckLockState(); |
| |
| // Called when the idle state changes from unlocked to locked. |
| void OnScreenLocked(); |
| |
| // Called when the idle state changes from locked to unlocked. |
| void OnScreenUnlocked(); |
| |
| // Helper functions for dealing with the timer that hides the System Media |
| // Transport Controls on the lock screen 5 seconds after the user pauses. |
| void StartHideSmtcTimer(); |
| void StopHideSmtcTimer(); |
| void HideSmtcTimerFired(); |
| |
| bool screen_locked_ = false; |
| base::RepeatingTimer lock_polling_timer_; |
| base::OneShotTimer hide_smtc_timer_; |
| |
| // Our connection to Window's System Media Transport Controls. |
| system_media_controls::SystemMediaControlsService* service_ = nullptr; |
| |
| // used to connect to the Media Session service. |
| service_manager::Connector* connector_; |
| |
| // Tracks current media session state/metadata. |
| mojo::Remote<media_session::mojom::MediaController> media_controller_; |
| media_session::mojom::MediaSessionInfoPtr session_info_ptr_; |
| |
| // Used to receive updates to the active media controller. |
| mojo::Receiver<media_session::mojom::MediaControllerObserver> |
| media_controller_observer_receiver_{this}; |
| mojo::Receiver<media_session::mojom::MediaControllerImageObserver> |
| media_controller_image_observer_receiver_{this}; |
| |
| SEQUENCE_CHECKER(sequence_checker_); |
| |
| DISALLOW_COPY_AND_ASSIGN(SystemMediaControlsNotifier); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_MEDIA_SYSTEM_MEDIA_CONTROLS_NOTIFIER_H_ |